I made an account specifically to ask: how can ANYBODY believe that Tobi=Obito? If that was the case, he should still be pretty young, just like Kakashi and that's impossible! Tobi was already old in his fight against Minato to the point that the 4th Hokage assumed it was Madara! You can even see Tobi taking his mask off a little while talking to Sasuke and you can clearly see his advanced age at that moment.